CN113115390A

CN113115390A - Data transmission method, terminal equipment and network equipment

Info

Publication number: CN113115390A
Application number: CN202110408899.0A
Authority: CN
Inventors: 尤心; 卢前溪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2021-07-13
Also published as: AU2018442732A1; TW202027471A; JP7431219B2; KR20210048500A; CN112470518A; KR102592535B1; EP3820196A4; EP3820196B1; US11516726B2; WO2020061943A1; EP3820196A1; US20210176695A1; JP2022501888A

Abstract

The invention discloses a data transmission method, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product and a computer program, comprising: and when the terminal equipment is successfully switched to the target network equipment, forwarding data to the target network equipment.

Description

Data transmission method, terminal equipment and network equipment

The application is a divisional application of application with application date of 09 and 27 in 2018, application number of 2018800958799 and invented name of 'a data transmission method, terminal equipment and network equipment'.

Technical Field

The present invention relates to the field of information processing technologies, and in particular, to a data transmission method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.

Background

In the mobile communication process, a handover may fail in the handover process, in the existing handover, when the terminal device receives a handover command of the source network device, the terminal device and the source network device stop data transmission, and the source network device sends a status report of the received data to the target network device. However, when there are more switching scenarios, how to control data transmission between the source network device and the target network device is a problem to be solved.

Disclosure of Invention

To solve the foregoing technical problem, embodiments of the present invention provide a data transmission method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.

In a first aspect, an embodiment of the present invention provides a data transmission method, applied to a source network device, including:

and when the terminal equipment is successfully switched to the target network equipment, forwarding data to the target network equipment.

In a second aspect, an embodiment of the present invention provides a data transmission method, applied to a source network device, including:

and forwarding the data to at least one target network device.

In a third aspect, an embodiment of the present invention provides a data transmission method, applied to a target network device, including:

and when the terminal equipment is determined to be successfully switched to the target network equipment, receiving the data forwarded by the source network equipment.

In a fourth aspect, an embodiment of the present invention provides a data transmission method, applied to a target network device, including:

receiving data forwarded by source network equipment; the target network device is one of at least one target network device configured for the terminal device by the network side.

In a fifth aspect, an embodiment of the present invention provides a source network device, including:

the first processing unit is used for forwarding data to the target network equipment through the first communication unit when the terminal equipment is determined to be successfully switched to the target network equipment;

the first communication unit is used for transmitting data to the target network equipment.

In a sixth aspect, an embodiment of the present invention provides a source network device, including:

and the second communication unit forwards the data to at least one target network device.

In a seventh aspect, an embodiment of the present invention provides a target network device, including:

the third processing unit receives the data forwarded by the source network equipment through the third communication unit when the terminal equipment is determined to be successfully switched to the target network equipment;

and the third communication unit is used for receiving the data sent by the source network equipment.

In an eighth aspect, an embodiment of the present invention provides a target network device, including:

the fourth communication unit receives the data forwarded by the source network equipment; the target network device is one of at least one target network device configured for the terminal device by the network side.

In a ninth aspect, an embodiment of the present invention provides a network device, which includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the fourth aspect or each implementation manner thereof.

A tenth aspect provides a chip for implementing the method of any one of the first to fourth aspects or implementations thereof.

Specifically, the chip includes: a processor configured to call and run the computer program from the memory, so that the device on which the chip is installed performs the method in any one of the first aspect to the second aspect or the implementation manners thereof.

In an eleventh aspect, a computer-readable storage medium is provided for storing a computer program, which causes a computer to execute the method of any one of the first to fourth aspects or implementations thereof.

In a twelfth aspect, there is provided a computer program product comprising computer program instructions to cause a computer to perform the method of any of the first to fourth aspects or implementations thereof.

In a thirteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to fourth aspects or implementations thereof described above.

According to the technical scheme of the embodiment of the invention, after the terminal equipment is successfully connected with the target network equipment, the source network equipment transmits data to the target network equipment; therefore, the scheme provides a new scene for sending data by the source network equipment, so that the scheme is suitable for more switching scenes.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

fig. 2 is a first flowchart of a data transmission method according to an embodiment of the present application;

fig. 3 is a schematic diagram of a handover processing scenario according to an embodiment of the present invention;

fig. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a data transmission method provided in the embodiment of the present application;

fig. 6 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 8 is a first schematic diagram of a network device structure according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a network device structure according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

FIG. 11 is a schematic block diagram of a chip provided by an embodiment of the present application;

fig. 12 is a schematic diagram two of a communication system architecture provided in an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

For example, a communication system 100 applied in the embodiment of the present application may be as shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Network device (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (terminal Equipment), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

The first embodiment,

An embodiment of the present invention provides a data transmission method, which is applied to a source network device, and as shown in fig. 2, the method includes:

step 201: and when the terminal equipment is successfully switched to the target network equipment, forwarding data to the target network equipment.

The following scenarios can be applied to this embodiment: one is that the terminal device obtains at least one target network device, then selects one target network device from the at least one target network device, and initiates a handover connection to the selected target network device, at this time, the terminal device may maintain the connection with the source network device, or may disconnect the connection with the source network device; the source network device determines at least one network device that the terminal device can access, selects a target network device from the at least one network device for the terminal device, and sends the selected target network device to the terminal device, so that the terminal device can initiate a connection to the target network device.

Before forwarding data to the target network device, or when it is determined that the terminal device is successfully handed over to the target network device, the method further includes:

and receiving the identification information of the target network equipment.

The method for receiving the identification information of the target network device may be that, when the source network device and the terminal device are connected, the identification information of the target network device which is successfully switched and sent by the terminal device may be received; or, receiving the identification information sent by the target network device;

when the source network device is disconnected from the terminal device, the identification information sent by the target network device can be received. The target network device may carry the identification information through network signaling or indication information.

The forwarding data to the target network device includes: and forwarding the uplink data and/or the downlink data to the target network equipment.

The process of forwarding data may refer to the following process flow, and the source network device may obtain information of a corresponding target network device from at least one target network device. As to the process of switching and acquiring the related information, see fig. 3, which includes:

a switching preparation stage, comprising steps 1-6 in the figure, in which the source network equipment sends measurement control to the terminal equipment; after the terminal equipment measures a plurality of network equipment or cells, the terminal equipment sends a measurement report to the source network equipment; the source network device makes a switching decision according to the measurement report (or in combination with the RRM information); the source network equipment sends a switching request to the target network equipment so that the target network equipment is ready for switching; the target network equipment performs switching permission control according to the switching request; and when the target network equipment determines to perform switching, the target network equipment sends a switching request confirmation to the source network equipment.

Then, a switching execution phase is performed, which includes steps 7-11 in the figure, specifically: the target network equipment generates Radio Resource Control (RRC) information, sends the RRC connection reconfiguration information to the source network equipment, and the source network equipment sends the RRC connection reconfiguration information to the terminal equipment; after receiving the RRC connection reconfiguration information, the terminal equipment executes switching processing according to the connection reconfiguration information; then the source network equipment forwards data to the target network equipment; the terminal equipment synchronizes with the target network equipment, then receives the UL allocation of the target network equipment, and sends RRC connection reconfiguration completion information to the target network equipment.

Finally, entering a switching completion stage, including steps 12-18 in the figure, specifically: the target network equipment sends a path switching request to the MME to inform the MME that the terminal equipment changes the cell; MME sends a load adjustment request to a service gateway, and the service gateway carries out downlink path switching processing; after the service gateway finishes processing, sending bearing adjustment finishing information to the MME, and sending a confirmation message of a path switching request to the target network equipment by the MME; the target network device informs the source network device of the context release of the terminal device, and the source network device releases the resource.

Wherein the forwarding data to the target network device further comprises at least one of:

sending a data status report to the target network device; sending the serial number SN of the data packet of the source network equipment side to the target network equipment; and sending Data Radio Bearer (DRB) configuration to the target network equipment.

Specifically, the information forwarded by the source network device to the target network device may include SN status transmission information; the SN status information includes an uplink Packet Data Convergence Protocol (PDCP) SN reception status, a downlink PDCP SN transmission status, and the like. Further, the uplink PDCP SN receiving state at least includes a first missing uplink service data unit SDU of the PDCP SN, and may further include a bitmap of an out-of-order receiving state of the uplink SDU; the downlink PDCP SN transmission status may include a next PDCP SN, which is a new SDU to be allocated by the target network device. Further, other information is not exhaustive here.

It should be further noted that a scenario of this embodiment includes a situation that the terminal device maintains a connection state with the source network device during handover, where the target network device may be the auxiliary node SN, and the source network device is the master node MN. It is noted here that in the Long Term Evolution (LTE) system, SN is called SCG, and in the New Radio (NR) SN refers to the same concept, namely the second serving network device in the dual connectivity DC scenario. Specifically, the connection state of the terminal device may be: the terminal equipment is in connection with the source network equipment and fails to be connected with the target network equipment; the terminal equipment is disconnected with the source network equipment and successfully connected with the target network equipment; the connection between the terminal equipment and a Secondary Cell Group (SCG) fails, and the SCG fails to change the connection. Of course, in a scenario where multiple SCGs are configured, the terminal device fails to connect to one SCG; in a scenario in which a plurality of target cells are configured, a terminal device fails to connect to one target cell. Other suitable scenarios may exist, but are not exhaustive in this embodiment.

In addition, in the above scenario, when initiating connection to the first target network device and maintaining connection with the source network device, the terminal device in this embodiment may also maintain connection with the source network device; the terminal equipment reserves a first protocol stack and a first related key of source network equipment and maintains a second protocol stack and a second related key between the terminal equipment and first target network equipment; wherein the first correlation key is different from the second correlation key. The second correlation key may be generated from the first correlation key.

For example, when the 5G system is targeted, different Service Data Attachment Protocols (SDAP), different Packet Data Convergence Protocols (PDCP), different Radio Link layer Control protocols (RLC), different Media Access Control (MAC) entities, and different Low layer (Low layer) entities may be maintained between the terminal device and the source network device and between the terminal device and the first target network device; when the method is applied to a 4G system, different Packet Data Convergence Protocols (PDCP) between the terminal device and the source network device, and between the terminal device and the first target network device, different Radio Link Control protocols (RLC), different Media Access Control (MAC) entities, and different Low layer (Low layer) entities may be maintained. In addition, in the scheme provided in this embodiment, in order to ensure that different keys are used, the PDCP of the first protocol stack and the PDCP of the second protocol stack are different. At least one of the SDAP, RLC, MAC, and physical layers may be the same or different. Alternatively, the first protocol stack and the second protocol stack may share at least one of the SDAP, RLC, MAC, and physical layer, or may own the SDAP, RLC, MAC, and physical layer, respectively.

In another scenario of this embodiment, it may be that a source network device configures a plurality of target network devices for a terminal device, and at this time, before forwarding data to the target network device when it is determined that the terminal device is successfully switched to the target network device, the method further includes: sending a switching command to the terminal equipment; wherein the handover command is used to indicate at least one target network device to a terminal device. That is to say, when the source network device configures a plurality of target network devices for the terminal device, correspondingly, the terminal device may select one of the target network devices as the target network device that currently initiates the connection, and at this time, the connection may be maintained or disconnected with the source network device.

The handover command includes a reconfiguration message of at least one target network device. The source network device may select to send the reconfiguration messages of multiple target network devices to the terminal device at one time, or send the reconfiguration message of only one target network device at one time, but send the reconfiguration message of only one target network device for multiple times, for example, the source network device sends another new reconfiguration message of the target network device after the failure of switching to one target network device, which is not described again.

Therefore, by adopting the scheme, the data can be transmitted from the source network equipment to the target network equipment after the terminal equipment is successfully connected with the target network equipment; therefore, the scheme provides a new scene for sending data by the source network equipment, so that the scheme is suitable for more switching scenes.

Example II,

An embodiment of the present invention provides a data transmission method, which is applied to a source network device, and as shown in fig. 4, the method includes:

step 401: and forwarding the data to at least one target network device.

The difference from the embodiment is that the embodiment does not limit sending data again when the terminal device and the target network device are required to establish connection successfully, but directly sends data to a plurality of target network devices.

The present embodiment may be applicable to a scenario in which the terminal device acquires at least one target network device, selects one target network device from the at least one target network device, and initiates a handover connection to the selected target network device, where at this time, the terminal device may maintain a connection with the source network device, and may also disconnect the connection with the source network device.

a switching preparation stage, comprising steps 1-6 in the figure, in which the source network equipment sends measurement control to the terminal equipment; after the terminal equipment measures a plurality of network equipment or cells, the terminal equipment sends a measurement report to the source network equipment; the source network device makes a handover decision based on the measurement report (or in combination with RRM information); the source network equipment sends a switching request to the target network equipment so that the target network equipment is ready for switching; the target network equipment performs switching permission control according to the switching request; and when the target network equipment determines to perform switching, the target network equipment sends a switching request confirmation to the source network equipment.

Then, a switching execution phase is performed, which includes steps 7-11 in the figure, specifically: the target network equipment generates RRC information, sends the RRC connection reconfiguration information to the source network equipment, and the source network equipment sends the RRC connection reconfiguration information to the terminal equipment; after receiving the RRC connection reconfiguration information, the terminal equipment executes switching processing according to the connection reconfiguration information; then the source network equipment forwards data to the target network equipment; the terminal equipment synchronizes with the target network equipment, then receives the UL allocation of the target network equipment, and sends RRC connection reconfiguration completion information to the target network equipment.

Specifically, the information forwarded by the source network device to the target network device may include SN status transmission information; the SN status information includes an uplink Packet Data Convergence Protocol (PDCP) SN reception status, a downlink PDCP SN transmission status, and the like. Further, the uplink PDCP SN receiving state at least includes the first missing uplink SDU of the PDCP SN, and may further include a bitmap of the out-of-order receiving state of the uplink SDU; the downlink PDCP SN transmission status may include a next PDCP SN, which is a new SDU to be allocated by the target network device. Further, other information is not exhaustive here.

It is further noted that the target network device may be a secondary node SN, and the source network device is a primary node MN. It is noted here that in the Long Term Evolution (LTE) system, SN is called SCG, and in the New Radio (NR) SN refers to the same concept, namely the second serving network device in the DC scenario. Specifically, the connection state of the terminal device may be: the terminal equipment is in connection with the source network equipment and fails to be connected with the target network equipment; the terminal equipment is disconnected with the source network equipment and successfully connected with the target network equipment; the connection between the terminal equipment and a Secondary Cell Group (SCG) fails, and the SCG fails to change the connection. Of course, in a scenario where multiple SCGs are configured, the terminal device fails to connect to one SCG; in a scenario in which a plurality of target cells are configured, a terminal device fails to connect to one target cell. Other suitable scenarios may exist, but are not exhaustive in this embodiment.

In a scenario of this embodiment, it may be that a source network device configures a plurality of target network devices for a terminal device, and at this time, before forwarding data to at least one target network device, the method further includes:

sending a switching command to the terminal equipment; wherein the handover command is used to indicate the at least one target network device to a terminal device.

That is to say, when the source network device configures a plurality of target network devices for the terminal device, correspondingly, the terminal device may select one of the target network devices as the target network device that currently initiates the connection, and at this time, the connection may be maintained or disconnected with the source network device.

Therefore, by adopting the scheme, the source network equipment can directly transmit data to at least one target network equipment of the terminal equipment; therefore, the scheme provides a new scene for sending data by the source network equipment, so that the scheme is suitable for more switching scenes, and the source network equipment can directly send data to the target network equipment, so that the scheme can reduce the flow of acquiring the relevant data of the terminal equipment after switching is completed, and further improve the switching efficiency.

Example III,

An embodiment of the present invention provides a data transmission method, which is applied to a target network device, and as shown in fig. 5, the method includes:

step 501: and when the terminal equipment is determined to be successfully switched to the target network equipment, receiving the data forwarded by the source network equipment.

and sending the identification information of the target network equipment to the source network equipment.

The receiving of the data forwarded by the source network device includes:

and receiving the uplink data and/or the downlink data forwarded by the source network equipment.

Wherein, the receiving the data forwarded by the source network device further includes at least one of:

receiving a data status report forwarded by the source network equipment;

receiving a serial number SN of a data packet at a source network equipment side forwarded by the source network equipment;

and receiving the DRB configuration of the data radio bearer forwarded by the source network equipment.

It should be further noted that a scenario of this embodiment includes a situation that the terminal device maintains a connection state with the source network device during handover, where the target network device may be the auxiliary node SN, and the source network device is the master node MN. It is noted here that in the Long Term Evolution (LTE) system, SN is called SCG, and in the New Radio (NR) SN refers to the same concept, namely the second serving network device in the DC scenario. Specifically, the connection state of the terminal device may be: the terminal equipment is in connection with the source network equipment and fails to be connected with the target network equipment; the terminal equipment is disconnected with the source network equipment and successfully connected with the target network equipment; the connection between the terminal equipment and a Secondary Cell Group (SCG) fails, and the SCG fails to change the connection. Of course, in a scenario where multiple SCGs are configured, the terminal device fails to connect to one SCG; in a scenario in which a plurality of target cells are configured, a terminal device fails to connect to one target cell. Other suitable scenarios may exist, but are not exhaustive in this embodiment.

In another scenario of this embodiment, it may be that a source network device configures a plurality of target network devices for a terminal device, and at this time, when it is determined that the terminal device is successfully switched to the target network device, the source network device sends a switching command to the terminal device before forwarding data to the target network device; wherein the handover command is used to indicate at least one target network device to a terminal device. That is to say, when the source network device configures a plurality of target network devices for the terminal device, correspondingly, the terminal device may select one of the target network devices as the target network device that currently initiates the connection, and at this time, the connection may be maintained or disconnected with the source network device.

Example four,

An embodiment of the present invention provides a data transmission method, which is applied to a target network device, and as shown in fig. 6, the method includes:

step 601: receiving data forwarded by source network equipment; the target network device is one of at least one target network device configured for the terminal device by the network side.

The difference from the third embodiment is that, in this embodiment, data is not limited to be sent again when the connection between the terminal device and the target network device is required to be successfully established, but data is directly sent to a plurality of target network devices.

The receiving of the data forwarded by the source network device includes: and receiving the uplink data and/or the downlink data forwarded by the source network equipment.

receiving a data state report forwarded by source network equipment;

receiving a serial number SN of a data packet at a source network equipment side forwarded by source network equipment;

In a scenario of this embodiment, it may be that a source network device configures a plurality of target network devices for a terminal device, and at this time, after receiving data forwarded by the source network device, the method further includes:

when the target network equipment is successfully connected with the terminal equipment, retaining the data sent by the source network equipment;

and when the connection between the target network equipment and the terminal equipment fails, deleting the data sent by the source network equipment.

That is, when the target network device is connected to the terminal device, the data sent by the source network device is received; and when the success or failure of the connection between the target network equipment and the terminal equipment is determined, whether the data sent by the source network equipment is reserved is determined. Therefore, the storage load of the network equipment can not be increased while the switching efficiency is ensured.

Example V,

An embodiment of the present invention provides a source network device, as shown in fig. 7, including:

a first processing unit 71, configured to forward data to a target network device through a first communication unit when it is determined that the terminal device is successfully switched to the target network device;

a first communication unit 72, configured to send data to the target network device.

Before forwarding data to the target network device or when determining that the terminal device is successfully handed over to the target network device, the first communication unit 72 receives the identification information of the target network device.

Wherein the first communication unit 72 performs at least one of:

In another scenario of this embodiment, it may be that a source network device configures a plurality of target network devices for a terminal device, and at this time, when it is determined that the terminal device is successfully switched to the target network device, a switching command is sent to the terminal device before data is forwarded to the target network device; wherein the handover command is used to indicate at least one target network device to a terminal device. That is to say, when the source network device configures a plurality of target network devices for the terminal device, correspondingly, the terminal device may select one of the target network devices as the target network device that currently initiates the connection, and at this time, the connection may be maintained or disconnected with the source network device.

Example six,

An embodiment of the present invention provides a source network device, including:

In this embodiment, data is not sent again when the connection between the terminal device and the target network device is successfully established, but is directly sent to a plurality of target network devices.

And the second communication unit forwards the uplink data and/or the downlink data to the target network equipment.

Wherein the second communication unit further performs at least one of:

In the scenario of this embodiment, it is possible that the source network device configures a plurality of target network devices for the terminal device, and at this time, before forwarding data to at least one target network device, the second communication unit sends a handover command to the terminal device; wherein the handover command is used to indicate the at least one target network device to a terminal device.

Example seven,

An embodiment of the present invention provides a target network device, as shown in fig. 8, including:

a third processing unit 81, configured to receive, through the third communication unit, data forwarded by the source network device when it is determined that the terminal device is successfully switched to the target network device;

the third communication unit 82 receives data from the source network device.

Before receiving the data forwarded by the source network device or when determining that the terminal device is successfully switched to the target network device, the third communication unit 82 sends the identification information of the target network device to the source network device.

The receiving of the data forwarded by the source network device includes:

Wherein the third communication unit 82 further performs at least one of:

receiving a data status report forwarded by the source network equipment;

Example eight,

An embodiment of the present invention provides a target network device, as shown in fig. 9, including:

a fourth communication unit 91, receiving data forwarded by the source network device; the target network device is one of at least one target network device configured for the terminal device by the network side.

The fourth communication unit 91 receives the uplink data and/or the downlink data forwarded by the source network device.

Wherein, the fourth communication unit 91 further performs at least one of the following:

receiving a data state report forwarded by source network equipment;

In this scenario, the target network device further includes: the fourth processing unit 92 is provided for processing the image data,

Fig. 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application, where the communication device may be the terminal device or the network device described above in this embodiment. The communication device 1000 shown in fig. 10 includes a processor 1010, and the processor 1010 may call and execute a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 10, the communication device 1000 may further include a memory 1020. From the memory 1020, the processor 1010 may call and execute a computer program to implement the method in the embodiment of the present application.

The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.

Optionally, as shown in fig. 10, the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 1030 may include a transmitter and a receiver, among others. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1000 may specifically be a network device in the embodiment of the present application, and the communication device 1000 may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the communication device 1000 may specifically be a terminal device or a mobile terminal in the embodiment of the present application, and the communication device 1000 may implement a corresponding process implemented by the mobile terminal/the terminal device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Fig. 11 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1100 shown in fig. 11 includes a processor 1110, and the processor 1110 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 11, the chip 1100 may further include a memory 1120. From the memory 1120, the processor 1110 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 1120 may be a separate device from the processor 1110, or may be integrated into the processor 1110.

Optionally, the chip 1100 may also include an input interface 1130. The processor 1110 may control the input interface 1130 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 1100 may further include an output interface 1140. The processor 1110 may control the output interface 1140 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the chip may be applied to the terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the terminal device in each method in the embodiment of the present application, and for brevity, details are not described here again.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 12 is a schematic block diagram of a communication system 1200 provided in an embodiment of the present application. As shown in fig. 12, the communication system 1200 includes a terminal device 1210 and a network device 1220.

The terminal device 1210 may be configured to implement corresponding functions implemented by the terminal device in the foregoing method, and the network device 1220 may be configured to implement corresponding functions implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method is applied to source network equipment and comprises the following steps:

forwarding data to a target network device when it is determined that the terminal device is successfully handed over to the target network device,

the target network device is a target network device determined by the terminal device from at least one target network device; and when the terminal equipment is successfully switched to the target network equipment, the source network equipment and the terminal equipment are in a disconnected state.

2. The method of claim 1, wherein upon determining that the terminal device successfully hands off to the target network device, the method further comprises:

and receiving the identification information of the target network equipment sent by the target network equipment.

3. The method of claim 1 or 2, wherein the forwarding data to the target network device comprises:

and forwarding the uplink data and/or the downlink data to the target network equipment.

4. The method of claim 3, wherein the forwarding data to the target network device further comprises at least one of:

sending a data status report to the target network device;

and sending the serial number SN of the data packet at the source network equipment side to the target network equipment.

5. The method according to any one of claims 1-4, wherein before forwarding data to a target network device when it is determined that a terminal device successfully hands over to the target network device, the method further comprises:

6. The method of claim 5, wherein the handover command includes a reconfiguration message of the at least one target network device.

7. A data transmission method is applied to target network equipment and comprises the following steps:

when the terminal device is successfully switched to the target network device, receiving the data forwarded by the source network device,

8. The method of claim 7, wherein upon determining that the terminal device successfully hands off to the target network device, the method further comprises:

9. The method of claim 7 or 8, wherein the receiving the data forwarded by the source network device comprises:

10. The method of claim 9, wherein the receiving the data forwarded by the source network device further comprises at least one of:

receiving a data status report forwarded by the source network equipment;

and receiving the serial number SN of the data packet at the source network equipment side forwarded by the source network equipment.

11. A source network device, comprising:

a first communication unit for transmitting data to the target network device,

12. The source network device of claim 11, wherein the first communication unit is further configured to receive identification information of the target network device sent by the target network device.

13. The source network device according to claim 11 or 12, wherein the first communication unit is configured to forward uplink data and/or downlink data to the target network device.

14. The source network device of claim 13, wherein the first communication unit is further configured to perform at least one of:

sending a data status report to the target network device;

15. The source network device according to any of claims 11-14, wherein the first communication unit is further configured to send a handover command to a terminal device; wherein the handover command is used to indicate the at least one target network device to a terminal device.

16. The source network device of claim 15, wherein the handover command includes a reconfiguration message of the at least one target network device.

17. A target network device, comprising:

the third processing unit is used for receiving the data forwarded by the source network equipment through the third communication unit when the terminal equipment is determined to be successfully switched to the target network equipment;

a third communication unit, configured to receive data sent by the source network device,

18. The target network device of claim 17, wherein the third communication unit is further configured to send identification information of the target network device to the source network device.

19. The target network device according to claim 17 or 18, wherein the third communication unit is configured to receive the upstream data and/or the downstream data forwarded by the source network device.

20. The target network device of claim 19, wherein the third communication unit is further configured to perform at least one of:

receiving a data status report forwarded by the source network equipment;

21. A network device, comprising: a processor and a memory for storing a computer program capable of running on the processor,

wherein the memory is adapted to store a computer program and the processor is adapted to call and run the computer program stored in the memory to perform the steps of the method according to any of claims 1-10.

22. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1-10.

23. A computer-readable storage medium for storing a computer program for causing a computer to perform the steps of the method according to any one of claims 1 to 10.

24. A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 10.

25. A computer program for causing a computer to perform the method of any one of claims 1-10.